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Title
# general
m

millions-camera-36633

04/04/2019, 4:20 AM
hey all I just have a question about Pulumi outputs. If i create a 'pure' output via
pulumi.output
, then export it as a stack output, it doesn't seem to appear in the stack outputs, where as outputs that are a side effects of creating a resource do
w

white-balloon-205

04/04/2019, 4:22 AM
The former should work as well. Note that if the value of the output is undefined, it will not show up as an export. If that’s not the case, could you share a snippet?
m

millions-camera-36633

04/04/2019, 4:23 AM
thanks let me just double check a few things
in the config we either use an existing DB url or create one, and in the case where we want to just use the url, we output that url so the deployment can use it
Copy code
export function setupRds(nodeSecurityGroup: aws.ec2.SecurityGroup){
    const config = new pulumi.Config();
    const existingDatabaseUrl = config.get("use_database_url");
    const newDatabaseConfig = config.get("create_database");
    const project = pulumi.getProject();
    
    let databaseUrlOutput;
    
    const configErrorMessage = `RDS config: specify either a URL to use (${project}:use_database_url) or options to create an RDS instance (${project}:create_database: '{"instanceClass": "db.t3.small", "allocatedStorage": 5}').`;
    
    if ((existingDatabaseUrl || "").length > 0 && (newDatabaseConfig || "").length > 0) {
        throw new Error(configErrorMessage)
    }
    

    if((existingDatabaseUrl || "").length > 0) {
        databaseUrlOutput = pulumi.output(existingDatabaseUrl);
    } else if ((newDatabaseConfig || "").length > 0) {
        const dbConfig = config.getObject<{instanceClass: string, allocatedStorage: number}>("create_database");
    
        if(!dbConfig || !dbConfig.instanceClass || !dbConfig.allocatedStorage) {
            throw new Error(configErrorMessage);
        }

        const dbUsername = "apollo";
        const dbName = "apollo";
        const dbPort = 5432;

        // <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_VPC.Scenarios.html#USER_VPC.Scenario1>
        const dbSecurityGroup = new aws.ec2.SecurityGroup("apollo-rds-sg", {
            ingress: [
                { protocol: "tcp", fromPort: 0, toPort: 65535, securityGroups: [nodeSecurityGroup.id] }, // All TCP
                { protocol: "tcp", fromPort: dbPort, toPort: dbPort, securityGroups: [nodeSecurityGroup.id] }, // Postgres
                { protocol: "icmp", fromPort: -1, toPort: -1, securityGroups: [nodeSecurityGroup.id] }, // All ICMP
            ],
            vpcId: nodeSecurityGroup.vpcId
        })
    
        const dbPassword = new random.RandomString("db-password", {
            length: 12,
            special: false
        });
    
        const rdsInstance = new aws.rds.Instance("apollo-rds", {
            engine: "postgres",
            instanceClass: dbConfig.instanceClass,
            username: dbUsername,
            password: dbPassword.result,
            name: dbName,
            port: dbPort,
            publiclyAccessible: false,
            allocatedStorage: dbConfig.allocatedStorage,
            vpcSecurityGroupIds: [dbSecurityGroup.id],
            skipFinalSnapshot: true
        });
    
        databaseUrlOutput = pulumi.all([rdsInstance.endpoint, dbPassword.result]).apply(
            ([endpoint, password]) => `postgres://${dbUsername}:${password}@${endpoint}/${dbName}`);
    }

    return databaseUrlOutput;
}
i worked it out, i had changed the code and not done a pulumi update
works as expected
👍 1
thanks for your help
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